login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A195277 Number of lower triangles of an n X n integer array with each element differing from all of its vertical and horizontal neighbors by 7 or less and triangles differing by a constant counted only once 0
1, 225, 507375, 11755976175, 2834518121474625, 7151051711514319493625, 189393562987102056163761489375 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Column 7 of A195278
LINKS
EXAMPLE
Some solutions for n=5
...0...............0...............0...............0...............0
..-5.-7...........-1.-5...........-7.-7...........-1.-8............4..6
..-8.-9.-8.........5..2..9........-7-14-17.........2.-4-11........-1.-1.-2
..-1.-2.-3..1.....-1.-5..2..8.....-4.-7-14-10......1.-1.-5.-7......2..4..4.-3
...5..3..3..5..6..-3.-2..5..9..6..-2.-5.-8-12-12..-1..4..0.-7-14...4..3..4.-3.-1
CROSSREFS
Sequence in context: A239478 A304314 A109688 * A319944 A013757 A151653
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 14 2011
STATUS
approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 18 00:08 EDT 2024. Contains 374377 sequences. (Running on oeis4.)